6.6L Gas V8 (L8T)

254 topics in this forum

1. Turning radius

   By Randy Ginoza, Friday at 07:59 PM
   • 4 replies
   • 146 views
   • 
   • StingerZ16
   • 4 hours ago

2. summer road trips in the 2026 2500HD

   By c4racer2, June 22
   • 7 replies
   • 379 views
   • 
   • c4racer2
   • 7 hours ago

3. Trim level custom/pro

   By Gary Doolin, June 22
   • 9 replies
   • 388 views
   • 
   • rjgvt
   • Friday at 12:38 PM

4. New or used

   By Gary Doolin, June 18
   • 5 replies
   • 319 views
   • 
   • Chuck FB
   • June 19

5. Road Master Active Suspension

   By GAMark, June 16
   • 6 replies
   • 383 views
   • 
   • MORSNO
   • Thursday at 08:17 PM

6. first oil change - 2026 2500HD gas

   By c4racer2, June 9
   • 14 replies
   • 797 views
   • 
   • c4racer2
   • June 18

7. Shopping for new truck and have question. 1 2

   By Gary Doolin, June 3
   • 19 replies
   • 871 views
   • 
   • asilverblazer
   • June 10

8. L8T and 93 octane or 90 rec gas.

   By GAMark, June 1
   • 12 replies
   • 715 views
   • 
   • GAMark
   • June 2

9. Banks Diff Cover.

   By GAMark, May 28
   • 0 replies
   • 172 views
   • 
   • GAMark
   • May 28

10. Oil Consumption 1 2 3 4 20

    By riddler, May 27
    • 289 replies
    • 10.8k views
    • 
    • riddler
    • June 23

11. Fluid Change Questions 1 2

    By Core-Lokt, May 20
    • 21 replies
    • 1.5k views
    • 
    • Core-Lokt
    • June 13

12. J&L OIL SEPARATOR CO 1 2

    By GAMark, May 13
    • 17 replies
    • 872 views
    • 
    • riddler
    • May 30

13. Cat back.

    By GAMark, May 10
    • 5 replies
    • 629 views
    • 
    • dal1980
    • May 25

14. Oil drain bolt washer. 1 2

    By GAMark, May 4
    • 27 replies
    • 1.6k views
    • 
    • Another JR
    • May 16

15. 2024 6.6 gas 28000 engine failure 1 2 3 4 5

    By James McArthur, April 28
    • 64 replies
    • 4.4k views
    • 
    • riddler
    • June 3

16. howdy from CO

    By c4racer2, April 25
    • 3 replies
    • 368 views
    • 
    • c4racer2
    • April 27

17. Anyone have a BANKS PEDAL MONSTER on their L8T??

    By No F-bdy Bs, April 22
    • 5 replies
    • 715 views
    • 
    • Byrds8
    • April 24

18. Which tire? 1 2 3

    By GAMark, April 15
    • 37 replies
    • 2.4k views
    • 
    • Chuck FB
    • June 2

19. A few items added to the 2500.

    By GAMark, April 14
    • 10 replies
    • 1.1k views
    • 
    • GAMark
    • April 29

20. 2021 Chevy Silverado 2500 HD L8T SELF DESTRUCT

    By Tallman3, April 1
    • 6 replies
    • 877 views
    • 
    • GMCustomerService
    • April 2

21. Hello from GA.

    By GAMark, March 26
    • 11 replies
    • 611 views
    • 
    • slj2008
    • April 14

22. Current Part Number for 153F Transmission Cooler Bypass Valve for 6L90

    By Another JR, March 26
    • 0 replies
    • 241 views
    • 
    • Another JR
    • March 26

23. 2021 6.6 gas Hollow tapping noise

    By Dusilligaf, March 23
    • 10 replies
    • 653 views
    • 
    • AT4X Steve
    • April 21

24. Oil filler extension tube 1 2

    By Randal Scott, March 21
    • 18 replies
    • 1.6k views
    • 
    • bruceb58
    • April 16

25. Non-dexos oil 1 2 3 4 5

    By chris-i, March 11
    • 66 replies
    • 4.6k views
    • 
    • PunchT37
    • April 30